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LT7A · 03-19-2022, 03:32 AM

Thanks for the link and the info. I think you mentioned a 411 ECU. Would that provide tuning advantages? 13.6 MPG sounds pretty dang good, especially all loaded up. Did you have to wait til black bear came to your area to do the tuning?

03-19-2022, 03:32 AM	#27
LT7A Registered User Join Date: Oct 2015 Location: PNW Posts: 3,517	Re: 1999 GMC Suburban K2500 DD Thanks for the link and the info. I think you mentioned a 411 ECU. Would that provide tuning advantages? 13.6 MPG sounds pretty dang good, especially all loaded up. Did you have to wait til black bear came to your area to do the tuning?